It says Sergio Adrian Hernandez Guereca whose body was found on the Mexican side of the border was killed by a shot that was apparently fired from the U.S. side.

Spokesperson Rupert Colville says the Office of the Human Rights Commissioner has received further allegations of excessive use of force by U.S. Border Patrol agents while enforcing immigration laws.

"These included the deaths of Mexican nationals one of whom is called Anastacio Hernandez Rojas, who was reportedly beaten to death in June 2010 near the crossing point into California; then there was a 17-year-old Ramsés Barrón Torres who was shot at the border with Arizona in January 2011, and José Alfredo Yanez Reyes who was shot at the border between Baja California, Mexico, and California, in June 2011. So we call on the U.S. government to facilitate the investigation into all these deaths."